The Old Town Hall (Altes Rathaus) is the building on the right with a small dome and its gold-coated Atlas on top.
The St. Nicolas Church (Nikolaikirche) is the biggest building on the photo. Its tower is currently wrapped for renovation.
The Fortuna Gate (Fortunaportal) is seen between the Old City Hall and the St. Nicolas Church. In reality, it is on the square in front of the church.